I caught up with Mr. Lukianoff at New York University in downtown Manhattan, where he was once targeted by the same speech restrictions that he has built a career exposing. Six years ago, a student group at the university invited him to participate in a panel discussion about the Danish cartoons depicting the Prophet Muhammad that had sparked violent rioting by Muslims across the world.

When Muslim students protested the event, NYU threatened to close the panel to the public if the offending cartoons were displayed. The discussion went on—without the cartoons. Instead, the student hosts displayed a blank easel, registering their own protest.

“The people who believe that colleges and universities are places where we want less freedom of speech have won,” Mr. Lukianoff says. “If anything, there should be even greater freedom of speech on college campuses. But now things have been turned around to give campus communities the expectation that if someone’s feelings are hurt by something that is said, the university will protect that person. As soon as you allow something as vague as Big Brother protecting your feelings, anything and everything can be punished.”

You might say Greg Lukianoff was born to fight college censorship. With his unruly red hair and a voice given to booming, he certainly looks and sounds the part. His ethnically Irish, British-born mother moved to America during the 1960s British-nanny fad, while his Russian father came from Yugoslavia to study at the University of Wisconsin. Russian history, Mr. Lukianoff says, “taught me about the worst things that can happen with good intentions.”

Growing up in an immigrant neighborhood in Danbury, Conn., sharpened his views. When “you had so many people from so many different backgrounds, free speech made intuitive sense,” Mr. Lukianoff recalls. “In every genuinely diverse community I’ve ever lived in, freedom of speech had to be the rule. . . . I find it deeply ironic that on college campuses diversity is used as an argument against unbridled freedom of speech.”

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A 2010 survey by the American Association of Colleges and Universities found that of 24,000 college students, only 35.6% strongly agreed that “it is safe to hold unpopular views on campus.” When the question was asked of 9,000 campus professionals—who are more familiar with the enforcement end of the censorship rules—only 18.8% strongly agreed.

Mr. Lukianoff thinks all of this should alarm students, parents and alumni enough to demand change: “If just a handful more students came in knowing what administrators are doing at orientation programs, with harassment codes, or free-speech zones—if students knew this was wrong—we could really change things.”

The trouble is that students are usually intimidated into submission. “The startling majority of students don’t bother. They’re too concerned about their careers, too concerned about their grades, to bother fighting back,” he says. Parents and alumni dismiss free-speech restrictions as something that only happens to conservatives, or that will never affect their own children.

“I make the point that this is happening, and even if it’s happening to people you don’t like, it’s a fundamental violation of what the university means,” says Mr. Lukianoff. “Free speech is about protecting minority rights. Free speech is about admitting you don’t know everything. Free speech is about protecting oddballs. It means protecting dissenters.”

Check out our Education category for many more examples of intolerance and sharia on campuses across North America and a site dedicated to mostly Muslim intimidation and Jew hatred on U.S. campuses at Campus Watch.